CN201319589Y

CN201319589Y - Micro-power single-line electronic switch power supply circuit

Info

Publication number: CN201319589Y
Application number: CNU2008202289660U
Authority: CN
Inventors: 杨韶军
Original assignee: CHAINTECH Co Ltd
Current assignee: CHAINTECH Co Ltd
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2009-09-30
Anticipated expiration: 2018-12-26

Abstract

A micro-power single-line electronic switch power supply circuit relates to an electronic switch circuit, in particular to a micro-power single-line electronic switch power supply circuit, which is characterized by comprising a surge absorption power switch circuit, a trigger circuit, an open-close state power supply circuit, a chopper voltage stabilizing circuit, a secondary voltage stabilizing circuit and an open-close state control circuit. The micro-power single line electronic switch power supply circuit overcomes the problem that an electronic switch only can control a load, thereby facilitating the electronic switch to directly replace a traditional mechanical switch in more places. In addition, the micro-power single-line electronic switch power supply circuit reduces the comprehensive use cost owing to low power consumption thereof, makes the electronic switch be easily received by people, solves the technical bottlenecks in the intellectualized development of the electronic switch, and greatly promotes the development of the electronic switch.

Description

A kind of little power consumption single line electronic switch power supply circuit

Technical field

The utility model relates to a kind of electronic switching circuit, especially a kind of little power consumption single line electronic switch power supply circuit.

Background technology

To concealed, its development is the change of contour structures to traditional family expenses electric light appliance switch, function singleness from exposed type.Along with scientific and technological progress and growth in the living standard, people are also more and more higher to lighting control convenience and energy conservation and environment protection, thereby developed remote control switch miscellaneous and automated intelligent switch in succession.Wherein the electronic switch of single line turnover has wide application prospect, its switch on wall of popularizing very much in can the direct substitution household on the one hand, install and replacement all very convenient; Can also realize remote control or Based Intelligent Control easily on the other hand.

The problem that existing little power consumption single line electronic switch has solved ON state and closed state power supply in the single line power supply technique, the little power consumption of closed state, the big electric current of ON state load has basically realized its intelligent use.But, still have the following disadvantages: the one, the anti-surge impact capacity is poor, can not realize the multi-load parallel connection; The single line electronic switch generally adopts controllable silicon or solid-state as the power switching device, and these devices are to the poor ability of transient current or voltage overload, even overload in short-term also can cause it to burn.During many lamps of load, as electricity-saving lamp and electric ballast fluorescent lamp, up to tens amperes, though start-up time is very short, controllable silicon still can't bear switch, finally causes burning at the surge current that starts moment loop generation.The 2nd, power supply quality is poor, ON state, closed state switched voltage instability, and the change in voltage amplitude is not bigger simultaneously for loadtype; In the single line power supply technique scheme, major part adopts a voltage-stabiliser tube regulated output voltage at present.Adopt the electronic switch of this scheme, flow through only tens microamperes of voltage-stabiliser tube electric current during closed state, and during ON state according to loading condition, as resistive, perceptual, capacitive, the electric current that flows through voltage-stabiliser tube from several milliamperes to tens milliamperes, alter a great deal owing to flow into the electric current of voltage-stabiliser tube, caused output voltage to change greatly.This unsettled voltage is to cause the electronic switch job insecurity, and the failure rate major reason for higher also is simultaneously to hinder the technical bottleneck of single line electronic switch to intelligent development.

Summary of the invention

Exist the anti-surge impact capacity poor for solving in the present single line electronic switch power supply technique, can not realize that multi-load is in parallel and power supply quality is poor, ON state, closed state switched voltage problem of unstable, a kind of anti-transient high-current impact capacity that possesses is provided, satisfy the product that all kinds of bearing powers and loadtype change, keep little power consumption single line electronic switch power supply circuit of output voltage stabilization.

Little power consumption single line electronic switch power supply circuit of the present utility model is characterized in that it is made of surge absorbing power switch circuit, circuits for triggering, open and close attitude power supply circuits, chopper stabilivolt circuit, secondary voltage stabilizing circuit and open and close attitude control circuit;

Described surge absorbing power switch circuit comprises bidirectional triode thyristor SCR, negative tempperature coefficient thermistor NTC and transient suppression device RV1; Negative tempperature coefficient thermistor NTC one end is connected to the A point, an other end is connected to the T2 utmost point of bidirectional triode thyristor SCR, sealing in bidirectional triode thyristor SCR is in the control loop of kernel control chip, and transient suppression device RV1 is connected in parallel on T1 and T2 the two poles of the earth of bidirectional triode thyristor SCR:

Described circuits for triggering comprise resistance R Q1, RQ2, RK1, electrochemical capacitor CTG, rectifier bridge DB1 and one-way SCR QS1; The T2 end of bidirectional triode thyristor SCR is connected to the interchange end of rectifier bridge DB1, control extremely is connected to the end of electrochemical capacitor CTG positive pole and resistance R Q1, the T1 end is connected to the negative pole of B point and electrochemical capacitor CTG and the end of resistance R Q2, the another one that the other end of resistance R Q1 and resistance R Q2 is connected to rectifier bridge DB1 exchanges end, the anode of rectifier bridge DB1 is connected to the positive pole of one-way SCR QS1, and negative terminal is connected to the negative pole of one-way SCR QS1 by resistance R K1;

Described open and close attitude power supply circuits comprise resistance R PW1, diode DP1, electrochemical capacitor CVC1, ceramic disc capacitor CPVC2; Resistance R PW1 one end connects the anode of rectifier bridge DB1, and the other end connects positive pole and the diode DP1 negative pole of ceramic disc capacitor CPVC2, electrochemical capacitor CVC1, and diode DP1 positive pole is connected to the negative terminal of rectifier bridge DB1 by resistance R K1;

Described chopper stabilivolt circuit comprises voltage stabilizing didoe DZ2, triode QS2, resistance R G2; Voltage stabilizing didoe DZ2 negative pole is connected to the positive pole of resistance R PW1 and ceramic disc capacitor CPVC2, electrochemical capacitor CVC1, its positive pole is connected to resistance R G2 one end, the other end of resistance R G2 is connected to the negative terminal of rectifier bridge DB1, the base stage of triode QS2 is connected to the positive pole of voltage-stabiliser tube DZ2, emitter is connected to the negative terminal of rectifier bridge DB1, and collector electrode is connected to the negative pole of one-way SCR QS1 and the end of resistance R K1;

Described secondary voltage stabilizing circuit comprises the accurate pressurizer Q1 of Coms, electrochemical capacitor CVC2; The input of Coms pressurizer Q1 is connected to the positive pole of electrochemical capacitor CVC1, and earth terminal is connected to the negative terminal of rectifier bridge DB1, and output is connected to the positive pole of CVC2;

Described open and close attitude control circuit comprises resistance R S1, RS2, RS4, capacitor C S1, triode QS3; The control end of one-way SCR QS1 is connected with ceramic disc capacitor CS1, resistance R S1, resistance R S2 one end, the other end of resistance R S1 and capacitor C S1 is connected to the negative terminal of rectifier bridge DB1, the other end of resistance R S2 is connected to triode QS3 emitter, the collector electrode of triode QS3 is connected to the positive pole of ceramic disc capacitor CPVC2, electrochemical capacitor CVC1, the base stage of triode QS3 is connected with resistance R S4 one end, and the resistance R S4 other end is connected to the C point.

Surge absorbing power switch circuit operation principle:

The resistance of negative tempperature coefficient thermistor NTC device is bigger under the normal temperature; the instantaneous surge current that bidirectional triode thyristor SCR produces when connecting load is born in the current range by the maximum that negative tempperature coefficient thermistor NTC is limited in bidirectional triode thyristor SCR, and SCR is not breakdown for the protection bidirectional triode thyristor.After load current was stable, also resistance descended rapidly negative tempperature coefficient thermistor NTC because generate heat, because the resistance after descending is very low, so can not increase the loop power consumption substantially.

When the control inductive load; the moment that switches on and off can produce induced voltage; bidirectional triode thyristor SCR may be punctured when induced voltage is higher; because the puncture voltage of transient suppression device RV1 in parallel is lower than the puncture voltage of bidirectional triode thyristor SCR; so when induced voltage surpasses the rated value of transient suppression device RV1; RV1 conducting short circuit at once, electric current discharges by load, has protected bidirectional triode thyristor SCR not breakdown.And when voltage recovered normal value, transient suppression device RV1 came back to blocking state, does not influence the loop operate as normal.

Electronic switch open and close attitude power supply the principle:

The C point is a low level during closed state, and triode QS3 ends, and resistance R S1 makes the current potential of one-way SCR QS1 consistent with resistance R K1, and one-way SCR QS1 ends, and capacitor C S1 can prevent the false triggering conducting of the disturbed back of one-way SCR QS1.Electric current only charges to electrochemical capacitor CVC1 by resistance R PW1 current limliting, CPVC2 filtering High-frequency Interference, the electric current the when value of adjustment resistance R PW1 can be adjusted closed state.When electrochemical capacitor CVC1 both end voltage rises to voltage-stabiliser tube DZ2 puncture voltage, it is constant that voltage stabilizing didoe DZ2 puncture conducting is kept the CVC1 both end voltage, Coms pressurizer Q1 provides stable power to control circuit with the voltage stabilizing once more of CVC1 voltage after CVC2 filtering.

The C point is a high level during ON state, by the base stage of resistance R S4 current limliting to triode QS3, triode QS3 conducting, voltage on the electrochemical capacitor CVC1 is by the collector and emitter of triode QS3, arrive the one-way SCR QS1 control utmost point through resistance R S2, RS1 dividing potential drop, the conducting that is triggered of one-way SCR QS1 is closed when ac zero-crossing point automatically.The conducting after-current is divided into 3 the tunnel: lead up to resistance R K1 to the negative terminal of rectifier bridge DB1, the two tunnel by the negative terminal of triode QS2 to rectifier bridge DB1, and three the tunnel pass through diode DP1 charges to electrochemical capacitor CVC1.

Triode chopper stabilivolt principle:

During the ON state power supply, one-way SCR QS1 conducting, electric current charges to electrochemical capacitor CVC1 by diode DP1, simultaneously by voltage stabilizing didoe DZ2, triode QS2, the chopper stabilivolt circuit that resistance R G2 forms is started working, chopper stabilivolt circuit working principle is: when electrochemical capacitor CVC1 both end voltage during greater than voltage stabilizing didoe DZ2 puncture voltage, voltage stabilizing didoe DZ2 punctures, the pressure drop that electric current produces on resistance R G2 makes triode QS2 conducting, make the negative electrode of one-way SCR QS1 and the negative terminal of rectifier bridge DB1 directly form the loop after the triode QS2 conducting, diode DP1 no longer includes electric current to be passed through, and electrochemical capacitor CVC1 does not have charging current voltage to be stopped to rise.And when electrochemical capacitor CVC1 both end voltage was lower than voltage stabilizing didoe DZ2 puncture voltage, resistance R G2 no current flow through, and triode QS2 ends, and electric current charges to electrochemical capacitor CVC1 by diode DP1 once more, and electrochemical capacitor CVC1 both end voltage rises.As seen the charging to electrochemical capacitor CVC1 is not continuously when ON state, but instantaneous, interrupted charging.

The circuits for triggering operation principle:

Because one-way SCR QS1 does not work by circuits for triggering, this circuit determines that by the resistance of resistance R PW1 power consumption can arrive the microwatt level fully to the electric current that control circuit provides during closed state.During ON state, one-way SCR QS1 conducting, electric current is by rectifier bridge DB1, the resistance R Q1 control utmost point G to bidirectional triode thyristor SCR.When electric current is enough big, bidirectional triode thyristor SCR triggering and conducting, the loop that the A in the short circuit current, B and load are connected into, load must be established beginning work by cable.Bidirectional triode thyristor SCR turn-offs during ac zero-crossing point, waits for for the second time and triggering.Bidirectional triode thyristor SCR was just reliably triggered after electrochemical capacitor CTG in the circuit and resistance R Q2 ensured the charging current that electrochemical capacitor CVC1 acquisition is enough when ON state.

Little power consumption single line electronic switch power supply circuit of the present utility model has overcome the problem that an electronic switch can only be controlled a load, makes the electronic switch can both directly substitute conventional mechanical switch in more conditions.In addition,, reduced the comprehensive use cost of electronic switch, made electronic switch easier, and solved the technical bottleneck of electronic switch, advanced the electronic switch development greatly to intelligent development by popular acceptance owing to its low-power consumption.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model

Embodiment

Embodiment 1:

Novel little power consumption single line electronic switch power supply circuit is characterized in that it is made of surge absorbing power switch circuit, circuits for triggering, open and close attitude power supply circuits, chopper stabilivolt circuit, secondary voltage stabilizing circuit and open and close attitude control circuit;

Described surge absorbing power switch circuit comprises bidirectional triode thyristor SCR, negative tempperature coefficient thermistor NTC and transient suppression device RV1; Negative tempperature coefficient thermistor NTC one end is connected to the A point, an other end is connected to the T2 utmost point of bidirectional triode thyristor SCR, sealing in bidirectional triode thyristor SCR is in the control loop of kernel control chip, and transient suppression device RV1 is connected in parallel on T1 and T2 the two poles of the earth of bidirectional triode thyristor SCR;

Claims

1, a kind of little power consumption single line electronic switch power supply circuit is characterized in that it is made of surge absorbing power switch circuit, circuits for triggering, open and close attitude power supply circuits, chopper stabilivolt circuit, secondary voltage stabilizing circuit and open and close attitude control circuit;